Bad Water Pumps

Gasuout

Gasuout

Johnny
Mar 20, 2008
2,188
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Santa Ana , Ca.
Well you all know I lost a pump coming back from Salt Flats .

The new pump on the way home from Dealer started making a whirling noise at around 2000 rpm going through the gears . Sounds kinda like a cross between a bad power steering pmp and a bad turbo whirling noise .

I called dealer immediatly and they said they have heard that before and we need to get another pump on it , but dont worry just drive it for a while .

Bad Idea , I was coming out of Laughlin Nevada monday night with 50 ft . trailer and 08 challenger srt 500 6.1 on it . 300 miles from home . I just left and was 5 miles out of Laughlin at around 5 pm when all the light came on in dash and I see 260 degs . I knew I only had a few seconds before it shut off . Just happened to be a small gravel area and pulled off 2 laned chitty road . Engine was full of water and only lost a small amount of water out of overflow . I was ready to call a tow truck but waited for it to cool down for an hour . I said screw it I going for it and tried to get it to Needles 20 miles down the road . I fired it up and went for it . It stayed cool and held at 210 deg all the way there . I left it running and pumped some fuel .

My next decision was to get on hwy 40 and go for it and head back to LA or stay in needles and get a pump put on it . With the noise coming from pump I knew it had to be bad or something . Dealer was closed and also needed to get this car back . I went for it and made it no temp problems all the way home . Got off frwy to deliver and holy moly getting hot fast , if I revved it quick or locked it in lower gear it would cool down . Made it home , and headed for my dealer first thing in the morning yesterday .

Well went in and pulled the pump and it came out with the gear that drives shaft barely on . We pulled the gear off with our hands . The dealer guys said only you Johnny . So we put anther pump on and I left last night and the new pump is making the same whirling noise . :cussing: I also did this one myself with mechanic to make sure it was all done right and especially the balancer bolt . Didnt want to spin another one , like last pump job and tow back . So I know it is on correct and previous one was also correct and flush to timing cover . not sure what is going on with pumps . They are not pinned , just pressed on to gear to shaft .

They were already calling GM to report an issue on these pumps . Not sure if there is a bad batch or what , and now I have another one making same noise .

Now I just went through all the balancer on off again and need to do it again . I dont think it is my truck or motor but bad pumps . The pump I lost coming back from Utah made no noise at all or I would think it might be my motor or something not aligning right .

Im now waiting for the dealer to call me and decide what they want to do .

Im ready to go buy new pump from different dealer hoping for a different batch of pumps . Not sure what else to do , but I do know now what is going on with the noise and what it leads too . Gears spinning on pump shaft inside . could go very bad and heat up shaft and lose water into oil or just cook motor again and not have it grab like this one did .

Bad water pumps are making me mad from dealer ..... :mad:

Man Im having some bad luck lately . now apart again .... Grrrrrrr

Dont want to drive it like this and risk motor damage .

Johnny
 
LarryJewell

LarryJewell

Back with his honey :)
Jan 21, 2007
10,152
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36
58
San Angelo
I'm on my third pump in 100K miles...............they blamed my failures on me using "water wetter" in the cooling system.
 
Gasuout

Gasuout

Johnny
Mar 20, 2008
2,188
0
0
Santa Ana , Ca.
When I left yesterday and heard the noise again I about crapped .

You hear it about 2000 rpm going through the gear . Faint whirling noise . If I didnt know what the noise was I would think it was my turbo .

But it isnt . It is the water pump . Something isnt lining up right with gears on pump to cam gear or this one is coming off like last one . :mad:
 
Gasuout

Gasuout

Johnny
Mar 20, 2008
2,188
0
0
Santa Ana , Ca.
Broken pump made this noise now new pump .

For water pump to be making same noise , it has to be gear alignment . Maybe I should try to loosen bolts and shift housing a hair to outside of motor or check and make sure it cant be shifted some in timing cover hole . Some kind of alignment has to be causing the whirling noise . Or its already spinning on shaft at around 2000 rpm , thats when I hear it .

Kinds like how a gear drive for a gasser can be noisy or quiet . maybe the tolerances or the cut on the gear the dealer had isnt right . Got me guessing though .

Cam driven Gear came right off drive shaft of pump when pulled out , it's suppose to be pressed on , and you could see it was spinning on shaft for 300 miles or more . Gears to tight maybe .

Previous pump when new motor went in didint make noise . now 2 pumps same noise . what the heck . Try another pump .

I guess it's pull the pump again to be safe . Glamis is coming soon , dont want any bad pump in the dunes . Knowing what this last pump did how can you really drive it waiting for it too do the same thing . Same noise , got about 1000 miles out it before it did this . Still want to figure out why .
 
LarryJewell

LarryJewell

Back with his honey :)
Jan 21, 2007
10,152
0
36
58
San Angelo
Gasuout said:
Thats ridiculous Larry , how could that effect anything .

Have any of you heard of pumps doing this ???
Click to expand...

:dontknow: that was the explanation, fwiw, I havent used it with the latest water pump and its lasted longer than the others :confused: probably coincendance, and they were all covered under warranty :)
 
Bluemax

Bluemax

???????????
Sep 25, 2006
846
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43
Missouri
I talked to a dealer at one time and that is one thing they warned me about. He said they had changed some that did and some that didn't whine. He told me that the whine had went away on the ones that they changed after some miles. According to the area service manager it was the new gear on the pump wearing to the gear on the engine.:rolleyes: Does make some sense i guess.:dontknow:
I wound up changing it myself and got the parts from Advanced Auto and never noticed any noises with it, but with the bigger turbo, intake, and stack right behind the cab who knows, it might whine like crazy, I'd never be able to tell.:)
 
Gasuout

Gasuout

Johnny
Mar 20, 2008
2,188
0
0
Santa Ana , Ca.
Well I put 500 miles on yesterday and still making the noise . It's more faint than first pump , but still very noticable .

My dealer called me back and they were looking at older pumps and comparing to new off shelf and noticed the cut on the gear is a bit different .

Our call got interupted and not finished , I will talk to them today and find out more .
 
MaxPowerLB7

MaxPowerLB7

Amateur
Nov 8, 2007
623
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39
Spanish Fork, UT
I have the exact same problem! Don't have a solution though... Old pump starting leaking out of the weep hole quite a bit, changed it and now it sounds like i've got a blower and a turbo:D

The bearing "felt" okay in the old one but the impeller walked off the shaft and was chewing into the housing. Also it is silent when the engine is cold but gets really noisy when its warm. Timing cover misalignment maybe... IDK
 
TrentNell

TrentNell

Finally underway !!!!!
Jul 7, 2008
7,543
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44
slc tuah
MaxPowerLB7 said:
I have the exact same problem! Don't have a solution though... Old pump starting leaking out of the weep hole quite a bit, changed it and now it sounds like i've got a blower and a turbo:D

The bearing "felt" okay in the old one but the impeller walked off the shaft and was chewing into the housing. Also it is silent when the engine is cold but gets really noisy when its warm. Timing cover misalignment maybe... IDK
Click to expand...

i've heard the noise will go away after as many as 2000 miles :rolleyes:, now that your an expert matt i might call in your services :baby: as mine is going to be changed this winter .
 
Gasuout

Gasuout

Johnny
Mar 20, 2008
2,188
0
0
Santa Ana , Ca.
I hear that cleaning up the gears is part of the process of making the gears . And after comparing my older one to new one you can see the gears are rougher looking on new and maybe this process is not being done by whoever is making the pumps or at least the gear for the AC pumps . Maybe a way that they are cutting cost on pumps and not cleaning up the gears like before . There is the AC Delco pumps and the Isuzu pumps . Maybe I should try a Isuzu pump and look at gear . All I know is the noise they make has to come from the gear alignment or really the cut on gear or clean edges on gear . I was thinking maybe I should get another one and take the wire wheel to it before install . If driving it for a few thousand miles is how they expect it to smoothen up . Then this sure couldnt hurt it . The problem I have with it is it caused mine to pull the gear off shaft from the way the gear is cut . Or the binding and angle of gear is causing it to pull in a direction . And that makes for a unreliable truck out on the road . You could also see that the spinning was getting shaft hot and seal was looking a little melted . Also not good to have it lose the seal and pump water into oil through seal . Could have been worse . Also another thing .... is the noise causing oil temperature from gears not meshing correctly . Or even letting little particals of metal off gear into oil .

My GM guy called in to GM to report the pump issue and they were already aware of it and the people complaining about them . They said to drive it and maybe it will clear up . My guy said he did that already and isnt to happy with the 260 deg results to motor . Mine was the first they had heard of with gear off shaft and spinning . Dont really have much choice but to pull it all down and try another pump .
 
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